Why Free Cash Flow is a Better Measure of Corporate Health Than EBITDA

To determine if a business is financially viable, evaluate its Free Cash Flow (FCF) rather than relying on its EBITDA. When Warren Buffett drafted his 2000 letter to Berkshire Hathaway shareholders, he targeted Earnings Before Interest, Taxes, Depreciation, and Amortization (EBITDA)—asking, 'Does management think the tooth fairy pays for capital expenditures?' Twenty-six years later, in 2026, EBITDA remains the dominant shorthand for corporate profitability, heavily utilized in mergers, acquisitions, and debt covenants. Yet, it routinely obscures the actual financial health of a business by ignoring the hard costs required to keep the doors open.[6]

EBITDA was popularized in the 1980s during the leveraged buyout era as a way to assess whether a company could service debt before accounting for its existing capital structure. By stripping away interest, taxes, depreciation, and amortization from net income, the metric isolates pure operational performance. It allows investors to compare the baseline profitability of two companies in the same industry, regardless of how they are financed or what tax jurisdictions they operate in. For a high-level view of operational efficiency, EBITDA provides a clean, standardized number.[2][3]

However, operational efficiency is not liquidity. A company can report a positive, growing EBITDA while simultaneously running out of money. Because EBITDA systematically adds back the exact cash outflows—interest and taxes—that a business is legally obligated to pay, it mathematically guarantees an overstatement of available cash for any company carrying debt. Furthermore, by ignoring depreciation, EBITDA pretends that the physical assets generating the revenue will never need to be repaired or replaced.[1][4]

Free Cash Flow strips away the accounting illusions to reveal the actual cash a business generates after funding its operating expenses and required capital investments. To calculate FCF, analysts start with operating cash flow and subtract capital expenditures (CapEx). This removes theoretical accounting assumptions and focuses entirely on real cash movement. If EBITDA is the theoretical maximum a company could earn in a vacuum, Free Cash Flow is the actual money left in the bank account at the end of the month.[4][5]

The most dangerous blind spot in EBITDA is its treatment of capital expenditures. Consider a heavy manufacturing firm or a telecommunications provider. These businesses must constantly invest in new machinery, server racks, and infrastructure just to maintain their current revenue levels. EBITDA completely ignores these massive cash outflows because they are capitalized rather than expensed immediately. Free Cash Flow, by contrast, deducts CapEx directly. A business might show $50 million in EBITDA, but if it requires $45 million in CapEx just to keep its factories running, its true financial flexibility is limited to the remaining $5 million.[1][4]

EBITDA also fails to account for changes in working capital—the money tied up in inventory, accounts receivable, and accounts payable. A company might recognize $10 million in revenue and record it as EBITDA, but if the customer takes 90 days to pay the invoice, the company has zero actual cash from that sale to make payroll today. Free Cash Flow adjusts for these timing differences. It penalizes a company for building up unsold inventory and rewards it for collecting receivables quickly, providing a real-time stress test of the company's operational cash cycle.[4][5]

For highly leveraged companies, relying on EBITDA is particularly hazardous. Interest payments are a mandatory, recurring cash outflow that can easily consume a company's entire operating profit. Because EBITDA adds back interest expense, it treats a company with zero debt and a company servicing a $40 million term loan at 6% interest as identical, provided their operating margins match. Free Cash Flow accounts for the cash required to service that debt, exposing the structural liquidity gap that leverage creates.[3]

The regulatory landscape also acknowledges these limitations. The Securities and Exchange Commission (SEC) strictly regulates the use of non-GAAP financial measures like EBITDA under Regulation G, established in 2003. The SEC requires public companies to reconcile EBITDA to the most directly comparable GAAP measure, typically net income, to prevent companies from misleading investors with inflated profitability figures. This regulatory friction underscores the inherent risk of treating EBITDA as a standalone indicator of health.

Relying solely on EBITDA to gauge corporate health is akin to evaluating a household's budget based entirely on gross salary, while ignoring the mortgage, taxes, and a leaking roof. Financial health requires a layered view. By anchoring analysis on Free Cash Flow, executives and investors can distinguish between a business that looks profitable on paper and one that is genuinely sustainable in reality.[1][4]